STV6688 datasheet(7/12 Pages) STMICROELECTRONICS

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STV6688

Electrical Characteristics

2.5

I²C Bus Selection

Data transfers follow the usual I²C format:

after the Start condition (S), a 7-bit slave

address is sent, followed by an 8-bit word

which is a data direction bit (W). An 8-bit

sub-address is sent to select a register,

followed by an 8-bit data word to be

included in the register.

The I²C Bus Decoder of the

microcontroller provides the Automatic

Incrementation mode in Write mode.

String Format: Write Only mode (S =

Start condition, P = Stop condition, A

= Acknowledge)

Input Signals Summary: (Write

Mode)

Input Signal: (Write Mode) Data Byte

Figure 2: I²C Bus Timings

t BUF

t LOW

t HIGH

t f

t r

t HD,STA

t HD,DAT

t SU,DAT

t SU,STA

t SU,STO

SDA

SCL

SDA

(Start, Stop)

SLAVE ADDRESS: 94h

00h

DATA

Reg.Addr.

(Hex)

Data

General

Stand-by

Buffer

Stand-by

Always set

to 1

Switch Control

Reg.

Addr.

Description

Bits

Data

Comments

0x00

General Stand-by

All disabled

All active

Buffer Stand-by

Buffer disabled

Buffer active

Y/CVBS and

C Selection

INT TV

IN1

IN2

IN3

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